CN209897033U - Automatic gain signal enhancer - Google Patents
Automatic gain signal enhancer Download PDFInfo
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- CN209897033U CN209897033U CN201921288893.9U CN201921288893U CN209897033U CN 209897033 U CN209897033 U CN 209897033U CN 201921288893 U CN201921288893 U CN 201921288893U CN 209897033 U CN209897033 U CN 209897033U
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Abstract
The utility model relates to an automatic gain signal intensifier, which comprises a microcontroller, a symmetrical uplink and a symmetrical downlink; each link comprises an input end low-noise amplifying circuit, an attenuator circuit, a middle-stage voltage amplifying circuit, an output end power amplifying circuit, a detection circuit and an amplifier circuit; the output of the input end low-noise amplifying circuit is connected to the input end of the middle-stage voltage amplifying circuit through the attenuator circuit, the output end of the middle-stage voltage amplifying circuit is connected to the input end of the output end power amplifying circuit, the output end of the output end power amplifying circuit is connected to the input end of the microcontroller through the detection circuit and the amplifier circuit in sequence, and the output end of the microcontroller is connected to the attenuator circuit. With the help of the utility model discloses a circuit can realize the automatic gain of signal.
Description
Technical Field
The utility model relates to the field of communication technology, especially an automatic gain's signal enhancement ware.
Background
With the continuous progress of wireless technology, communication clients are growing, and in this case, the phenomenon that cells are smaller and base stations are lower occurs. On the other hand, the WCDMA signal is linked by the propagation of electromagnetic waves, but in real life, because of the shelves of some buildings, signal blind areas of communication can be formed in many places such as the interior of some comparatively large buildings, basements, elevators, shopping malls, and the like. There is therefore a need for a high gain WCDMA signal enhancer to enhance signals.
In China, the coverage area of a signal enhancer on the market at present is 500 square meters, the price is 500 square meters, the maximum gain is 65db, and the output power is 20+1 dBm. In foreign countries, the coverage area is 500 square meters at 300-. And the signal intensifier in the prior art does not realize the effect of automatic high gain.
Disclosure of Invention
In view of this, the present invention provides an automatic gain signal enhancer, with the help of the circuit of the present invention, the gain of the signal can be realized.
The utility model discloses a following scheme realizes: an automatic gain signal booster comprising a microcontroller, symmetric uplinks and downlinks;
each link comprises an input end low-noise amplifying circuit, an attenuator circuit, a middle-stage voltage amplifying circuit, an output end power amplifying circuit, a detection circuit and an amplifier circuit;
the output of the input end low-noise amplifying circuit is connected to the input end of the middle-stage voltage amplifying circuit through the attenuator circuit, the output end of the middle-stage voltage amplifying circuit is connected to the input end of the output end power amplifying circuit, the output end of the output end power amplifying circuit is connected to the input end of the microcontroller through the detection circuit and the amplifier circuit in sequence, and the output end of the microcontroller is connected to the attenuator circuit.
Further, the microcontroller is a single chip microcomputer.
Furthermore, the input end low-noise amplification circuit adopts two BL051 low-noise amplifiers with the same parameters, and a decoupling circuit and a filter are sequentially connected behind each low-noise amplifier.
Further, the attenuator circuit adopts an attenuator with the model number of HMC 273.
Furthermore, the middle-stage voltage amplifying circuit adopts two BG18C amplifiers with the same parameters, and a decoupling circuit and a filter are sequentially connected behind each amplifier.
Further, the output end power amplification circuit adopts a power amplifier.
Further, the detector circuit is a diode detector circuit.
Further, the amplifier circuit employs an LM358 amplifier.
Compared with the prior art, the utility model discloses following beneficial effect has: the utility model adopts the low noise amplifier at the input end to reduce noise, and can improve the signal-to-noise ratio of output; a voltage amplifying circuit is adopted at the middle end, so that the output voltage amplitude of the circuit can be met; at the output, a power amplifier is used to ensure that the output power is sufficiently high.
Drawings
Fig. 1 is a schematic block diagram of an embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of an embodiment of the present invention.
Detailed Description
The present invention will be further explained with reference to the drawings and the embodiments.
As shown in fig. 1 and fig. 2, the present embodiment provides an automatic gain signal enhancer, which is designed mainly for china telecommunications and china unicom, and the mode is different from that for china mobile, the china telecommunications and china unicom use the WCDMA mode, and the china mobile uses the TD mode. The frequency band of this embodiment is 2110-2170MHz, uplink 1920-1980MHz, and downlink 2110-2170 MHz. Is a universal frequency band for China telecom and Unicom.
The signal enhancer of the embodiment specifically comprises a microcontroller, a symmetric uplink and a symmetric downlink;
each link comprises an input end low-noise amplifying circuit, an attenuator circuit, a middle-stage voltage amplifying circuit, an output end power amplifying circuit, a detection circuit and an amplifier circuit;
the output of the input end low-noise amplifying circuit is connected to the input end of the middle-stage voltage amplifying circuit through the attenuator circuit, the output end of the middle-stage voltage amplifying circuit is connected to the input end of the output end power amplifying circuit, the output end of the output end power amplifying circuit is connected to the input end of the microcontroller through the detection circuit and the amplifier circuit in sequence, and the output end of the microcontroller is connected to the attenuator circuit.
In this embodiment, the microcontroller is a single chip microcomputer, and the specific model is STC15W408 AS.
In this embodiment, the input end low noise amplifier circuit adopts two BL051 low noise amplifiers with the same parameters, and a decoupling circuit and a filter are sequentially connected behind each low noise amplifier.
In this embodiment, the attenuator circuit is an attenuator model HMC 273.
In this embodiment, the middle-stage voltage amplifying circuit adopts two BG18C amplifiers with the same parameters, and a decoupling circuit and a filter are sequentially connected behind each amplifier. The intermediate stage is a two-stage amplification.
In this embodiment, the output power amplifying circuit employs a power amplifier.
Preferably, compared with the voltage amplifying circuit, the power amplifying circuit has the following characteristics:
(1) the output power is as high as possible.
(2) The efficiency is high.
(3) The non-linear distortions, which are unavoidable if the operation of the transistors is close to the limit, should be designed to avoid distortions as much as possible.
(4) In a practical application circuit, the transistor is connected with a radiator and an overcurrent protection link.
In this embodiment, a first-stage power amplifier is adopted at the output end, and an SXA389 amplifier with stable performance and high efficiency is selected.
In this embodiment, the detector circuit is a diode detector circuit.
In the present embodiment, the amplifier circuit employs an LM358 amplifier.
The present embodiment further provides a method of a signal enhancer based on the above automatic gain, specifically: for a row link, an input end low-noise amplifying circuit is used for collecting, amplifying and reducing noise of an input signal, a middle-stage voltage amplifying circuit is used for amplifying the voltage of a signal output by the input end low-noise amplifying circuit to enable the voltage to meet the required signal amplitude, and an output end power amplifying circuit is used for amplifying the power of an output signal of the middle-stage voltage amplifying circuit.
In this embodiment, the output of the output power amplifying circuit is amplified by the amplifier circuit (LM 358 amplifier) after passing through the detector circuit, and the microcontroller collects the signal output by the amplifier circuit and determines whether the power of the output signal is within a preset range; the single chip microcomputer uses STC series. If the power exceeds the preset range, the microcontroller controls the attenuator circuit to attenuate, and simultaneously judges the amplitude of the attenuation of the attenuator, and the attenuation can reach the preset range (obtained by multiple tests); if the power is smaller than the preset range, the microcontroller releases the attenuation amplitude in the attenuator circuit; if the power is within the preset range, the power is directly output, and further the output power of the circuit signal is within the preset range.
Preferably, the whole circuit composition of this embodiment is divided into an uplink circuit, a downlink circuit, and a single chip microcomputer control module, where the uplink circuit and the downlink circuit are completely symmetrical, and only parameters of devices are different. Each row of circuits is mainly divided into three parts: (1) input-using low noise amplifier to reduce noise to improve output signal-to-noise ratio; (2) middle end-in order to meet the output voltage amplitude of the circuit, a voltage amplifying circuit is adopted; (3) output-to ensure the output power is large enough, a power amplifier is used.
The present embodiment is an automatic high gain enhancer for telecom and unicom WCDMA signals. The power amplification is realized by an uplink and a downlink which are composed of components such as a radio frequency duplexer, a low noise amplifier, an attenuator, a filter, a power amplifier and the like. The automatic gain part is composed of a detection circuit, an amplifier, a singlechip and an attenuator, and the output power is adjusted to reach a preset value of 22-25 dBm. The filter is used for filtering before the signal enters each stage of circuit, so that the effect of noise reduction is achieved.
Specifically, as shown in fig. 2, the output power of the present embodiment is displayed by indicator lights (LED 1 to LED3 in the figure) in three levels. The detection result shows that when the frequency band is 2110-2170MHz, the maximum gain is 72dB, and the output power is stabilized at 22-25 dBm.
The circuit work flow of the whole design of the embodiment is as follows: (1) the acquisition, amplification and noise reduction of signals are completed in the input end low-noise amplification circuit, in the embodiment, the low-noise amplification circuit adopts two amplifiers, the parameters of the two amplifiers are completely the same, the signal-to-noise ratio is improved to a great extent, and a common-mode signal is restrained. (2) The signal voltage from the front-end low-noise amplifier is amplified at the middle-end stage, so that the requirement on the signal amplitude can be met. (3) The output end power amplifying circuit amplifies the power of the intermediate-stage output signal, and can improve the power of the whole circuit. (4) The signal of the output end enters a detection circuit, and the detection circuit, an amplifier and an attenuator form an automatic gain circuit so as to realize that the output power of the circuit signal is in a preset range.
It is worth mentioning that the utility model protects a hardware structure, and does not require protection as to a control method and the like. The above is only a preferred embodiment of the present invention. However, the present invention is not limited to the above embodiments, and any equivalent changes and modifications made according to the present invention do not exceed the scope of the present invention, and all belong to the protection scope of the present invention.
Claims (8)
1. An automatic gain signal booster comprising a microcontroller, symmetric uplinks and downlinks;
each link comprises an input end low-noise amplifying circuit, an attenuator circuit, a middle-stage voltage amplifying circuit, an output end power amplifying circuit, a detection circuit and an amplifier circuit;
the output of the input end low-noise amplifying circuit is connected to the input end of the middle-stage voltage amplifying circuit through the attenuator circuit, the output end of the middle-stage voltage amplifying circuit is connected to the input end of the output end power amplifying circuit, the output end of the output end power amplifying circuit is connected to the input end of the microcontroller through the detection circuit and the amplifier circuit in sequence, and the output end of the microcontroller is connected to the attenuator circuit.
2. The signal booster of claim 1, wherein the microcontroller is a single-chip microcomputer.
3. The signal booster of claim 1, wherein the input low noise amplifier circuit employs two BL051 low noise amplifiers with the same parameters.
4. An automatic gain signal booster as claimed in claim 1 wherein said attenuator circuit employs an attenuator of the type HMC 273.
5. The signal booster of claim 1, wherein the mid-stage voltage amplification circuit employs two BG18C amplifiers with the same parameters.
6. The signal booster of claim 1, wherein the output power amplifier circuit comprises a power amplifier.
7. The signal booster of claim 1, wherein the detector circuit is a diode detector circuit.
8. The signal booster of claim 1, wherein the amplifier circuit is an LM358 amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921288893.9U CN209897033U (en) | 2019-08-09 | 2019-08-09 | Automatic gain signal enhancer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921288893.9U CN209897033U (en) | 2019-08-09 | 2019-08-09 | Automatic gain signal enhancer |
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| CN209897033U true CN209897033U (en) | 2020-01-03 |
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| CN201921288893.9U Active CN209897033U (en) | 2019-08-09 | 2019-08-09 | Automatic gain signal enhancer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110445499A (en) * | 2019-08-09 | 2019-11-12 | 泉州师范学院 | A kind of Signal Booster and method of automatic gain |
| CN110445499B (en) * | 2019-08-09 | 2024-05-14 | 泉州师范学院 | Automatic gain signal enhancer and method |
-
2019
- 2019-08-09 CN CN201921288893.9U patent/CN209897033U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110445499A (en) * | 2019-08-09 | 2019-11-12 | 泉州师范学院 | A kind of Signal Booster and method of automatic gain |
| CN110445499B (en) * | 2019-08-09 | 2024-05-14 | 泉州师范学院 | Automatic gain signal enhancer and method |
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